Appendix 2, 5/1/2005
Updated information based on actual test results shall be provided to the ISO-NE System Operator or its designate satellite as it becomes available.
- Owners of synchronous generators with ratings larger than 20.0 MVA connected to the FPL-NED transmission system shall notify the ISO-NE system operator of changes in the status of the speed/load governing controls for the turbine. The ISO-NE system operator or its designate satellite shall be made aware of nonfunctioning, partially functioning or blocked governor controls when these conditions are expected to persist for five days or more.
– Owners of synchronous generators with ratings larger than 20.0 MVA connected to the FPL-NED transmission system shall provide the ISO-NE system operator or its designate satellite with the transformer data as specified in FPL-NED’s Facility Connection Requirements document (Appendix 1, Sections L and M). Updated information shall be provided when transformer changes are made. The generator equipment owner will make transmission ratio changes as prescribed by ISO-NE policies and standards. As required by the NERC Planning Standards in Compliance Template III.C. S2 M6, the generating equipment owners are expected to make transformer tap changes during the next scheduled maintenance period, unless otherwise determined by ISO-NE.
– Most synchronous generator AVRs are equipped with limiting controls that help protect the generator while also allowing the generator to support the grid during temporary excursions in transmission voltage. These limiting controls must be properly coordinated with generator protection and with the generator’s short term voltage/reactive capabilities. Two common examples of these controls are the maximum excitation limiter (coordinates with overexcitation protection) and the minimum excitation limiter (coordinates with the loss of field relay).
Prior to commercial operation, the owner of a synchronous generator with a rating larger than 20.0 MVA shall provide FPL-NED and the ISO-NE system operator with documentation that describes the functional operation and settings for the AVR’s control functions. This documentation shall demonstrate the AVR’s controls are coordinated with the generator protection and with the generator’s short term capabilities. In cases where the AVR has been set to regulate a voltage other than the generator’s terminal voltage or it has been set to regulate a compensated terminal voltage, sufficient data shall be provided to allow the AVR to be modeled accurately.
– One of the standard generator commissioning tests is to introduce a step change in the AVR’s reference voltage with the generator running at synchronous speed but not connected to the transmission system. This is referred to the open circuit, step in voltage test and is used to confirm the AVR is functioning properly.
Prior to commercial operation, the owner of a synchronous generator with a rating larger than 20.0 MVA shall provide FPL-NED and the ISO-NE system operator with